環境
- therubyracer: 0.12.1
解決策
gem uninstall libv8
brew rm v8
brew tap homebrew/dupes
brew install apple-gcc42
brew tap homebrew/versions
brew install v8-315
brew link --force v8-315
bundleでinstall
bundle config build.libv8 --with-system-v8
bundle install --path vendor/bundle
その後にupdateする
bundle update libv8
bundle update therubyracer